Hey, I have a P4 2.8 GHz 915 , ASUS Mobo , Slackware linux 12 running kernel 2.6.23 right now , but have used most of the major (2.6.*) releases since 2.6.17 My computer on shutdown now -h never shut down. A "power down" is printed on the screen and the monitor goes black, but the comp never actually shutdown. I always had to kill power manually. I tried with the generic kernel supplied with slackware (everything is a module) as well as the huge kernel (everything is compiled in) as well as my own kernel builds since 2.6.18. Nothing made by comp actually halt on its own. I assumed it was a faulty ACPI on my computer, and didn't think much of it. I installed the latest 2.6.23 kernel. After installing , the shutdown now -h command still doesn't work. But I tested out the hibernate/suspend to disk via: echo shutdown >> /sys/power/disk echo disk >> /sys/power/state In this case, the system halts down. I want to know : if the hibernate / suspend to disk can halt my computer why can't shutdown now -h. Any reasons for this / fix ? Regards, dev Also , a 'halt' entry in my grub's menu.lst shuts down my computer just fine. - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html